The simple AR Turntable challenge - Page 2 - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 30th July 2013, 03:15 AM   #11
diyAudio Member
 
Join Date: Nov 2009
Location: Los Angeles
Quote:
Originally Posted by indianajo View Post
I had an AR turntable in 1970, a 1961 production model. When i walked around the wood floor in my Jim Walters home, the needle would bounce around on the record. This was with a Grado FTE cartridge at 1.5 g. The home had 10" floor joists on 12" centers, pretty stout floor I would think. I bought a US made BIC 940 changer in 1979; it worked a lot better, including passing the walk around test. I sold the AR in 1981. The BIC still works with the original belt (although it is due I am sure). I use it probably >500 plays a year now that I am not working. Using 1.5 g on a 1981Shure M97 Era IV cartridge. Found another BIC at a yard sale last year for $25. Worth every penny.
And the reason it jumped was because it - and MANY other - turntables ran the arm off balance such that the center of gravity is not at the vertical pivot. Your Thorens and all Dual turntables balance the arm and then add spring force relative to the deck plate. I sold a LOT of Duals back in the '70s by showing you could bounce it while it's playing. I don't remember if BIC ran off balance or not. The main bearing was so poor we didn't push them.

Man I don't miss turntables.

G
  Reply With Quote
Old 30th July 2013, 03:15 AM   #12
diyAudio Member
 
Join Date: Dec 2006
DIY styrofoam turntable. I like the days of the mass market corporations of the
60s and 70s. Turntables were mass produced and cheap compared to now. Need inexpensive turntables because records are coming back. Come on you guys where are your cheap diy turntables?
  Reply With Quote
Old 30th July 2013, 04:07 AM   #13
limono is offline limono  United States
diyAudio Member
 
Join Date: Mar 2007
$1000 is a lot of money for which you can buy used high-end deck ,all those unfashionable Sotas , LP12/Ittok with careful shopping ., very good Nottingham , or Well Tempered tables. Spending $1000 on DIY table when you're on a budget is a nonsense. Once you get table in $2-4 k (which can be had for $1k used ) and will be able to realize it's potential with appropriate (read rather expensive) cart and phono pre and know what to expect from DIY project and what direction take it than you can amuse yourself with throwing away $1k plus for such project. Three years ago my friend bought used Acoustic Solid table with Rega tonearm just for $1k. He looked it up , noticed how crude and simple device it is and said to me that he can copy it with the help of machinist for much much less than $1k .It didn't happened. He spent over $1.2k and couple of weeks polishing that table , bought two Chinese motor controllers which were rather marginal and the table sounded slightly worse than original. Slightly worse sounds rather innocent and if he hadn't have original table to compare he would have thought that it's a true high-end straight from his hands. Unfortunately the slightly worse quality was constant and constantly annoying him so not verbalized plan to sell original and enjoy the copy was not realized and his copy shines in the bedroom and I assure you he could use an income from the sale.
Now , Linn tweak for bouncing floors is to set the table on the stand next to the wall and rest (screw to the top shelf )two square pieces of wood between the top shelf and the wall -works like a charm.

Last edited by limono; 30th July 2013 at 04:18 AM.
  Reply With Quote
Old 30th July 2013, 07:04 AM   #14
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Sofia
Quote:
Originally Posted by limono View Post
$1000 is a lot of money for which you can buy used high-end
... amp ... dac .... cables. And if you don't like them you can sell, sometimes even at a profit and move on. Boring old common sense

Where is your diy spirit man??? Like spend 4x the cost of the drive units on crossover components. Or 3x the cost of a phono preamp on teflon riaa caps - happened just recently.

We need to tinker! Don't ya get it?

And to hell with common sense
  Reply With Quote
Old 30th July 2013, 08:27 AM   #15
Lavcat is offline Lavcat  United States
diyAudio Member
 
Lavcat's Avatar
 
Join Date: Dec 2009
Location: New Jersey USA
I had two AR turntables. I still have one. They are simple, low cost, and not at all effective. Suspension bottoms out with heavy LP's. Platter direction of rotation is random. Mat disintegrates. Stylus not perpendicular to the record groove.

In the winter a light bulb had to be placed next to the arm bearing to keep it from seizing.
  Reply With Quote
Old 30th July 2013, 10:36 AM   #16
diyAudio Member
 
Arch Stanton's Avatar
 
Join Date: Mar 2012
For the platter rotation there are two answers :
- one of the two coils in the motor is broken ;
- or the capacitor is dead.
  Reply With Quote
Old 30th July 2013, 02:08 PM   #17
limono is offline limono  United States
diyAudio Member
 
Join Date: Mar 2007
Quote:
Originally Posted by analog_sa View Post
... amp ... dac .... cables. And if you don't like them you can sell, sometimes even at a profit and move on. Boring old common sense

Where is your diy spirit man??? Like spend 4x the cost of the drive units on crossover components. Or 3x the cost of a phono preamp on teflon riaa caps - happened just recently.

We need to tinker! Don't ya get it?

And to hell with common sense
All true and I apologize for lacking the spirit
Here is mine clunker in works for ...I stopped counting years and money but getting close .,Zeiss microscope platform costed me $500 plus shipping (original price supposed to be ~$2.5-3K ) the rest ... I don't want to remember.
Attached Images
File Type: jpg parking ,gramofon itd 003.JPG (895.3 KB, 155 views)
File Type: jpg parking ,gramofon itd 004.jpg (598.2 KB, 147 views)
  Reply With Quote
Old 30th July 2013, 02:15 PM   #18
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
Wow, Limono, looks great! Reminds me of the Kuzma.

Nice!

Vince
Attached Images
File Type: jpg Kuzma_Stabi_S_tu_.jpg (53.0 KB, 142 views)
__________________
I build, therefore I am.
  Reply With Quote
Old 30th July 2013, 02:52 PM   #19
limono is offline limono  United States
diyAudio Member
 
Join Date: Mar 2007
Yes , it is inspired by Kuzma and the fact that I had an access to fairly inexpensive machining bronze rods. It will probably ring like a bell but since the platter is a PVC little ringing may bring some pleasant vibrations hehe , also since it would be medium weight I decided to incorporate a suspension of a sort . Then my initial plan of using tape drive was defeated since it requires rigid relation between motor and table so I acquired two additional pulleys (one just for a case ) for thread drive. Then I read how wonderful and precise Basis rubber belts are (at $120 a piece they better be) which would enable me using the tape pulley...then I got distracted and bought Rega P9 because the price was right then I thought I should do something with Thoresn TD124 sitting in the closet since everybody and their uncle was saying how wonderful they are ..My friend asked me to sell his old Linn Lp12 , what a marvelously colored sound .I just had to find myself one and I did and of course had to spend money on DIY Armageddon PSU I didn't have inclination to finish until this day .Then mint Acoustic Signature Final tool MKII German tank appeared in the neighborhood and I said to my distressed girl ..we're going to make a profit on this one...after 5 months she said well can we keep it and sell something else and the first time I felt like Ivor Tiefnenbrunand I said sure we KAN .
Back to the topic Linn springs work for AR-XA table and surely I have one in the box drilled out for Grace 707 waiting for fitting that arm which of course waits in another box. You get the drift now ??
  Reply With Quote
Old 30th July 2013, 03:23 PM   #20
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
Quote:
It will probably ring like a bell but since the platter is a PVC little ringing may bring some pleasant vibrations hehe
You notice the black band on the Kuzma? Wonder if that's to reduce any rining?

My pivot point mount is bronze and I'm not sure I like it. It's a lively metal.
Look cool!
__________________
I build, therefore I am.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
ar turntable arteta23 Analogue Source 8 11th April 2011 08:21 PM
New AR Turntable Gallery Pics ddarch44 Analogue Source 1 2nd July 2006 10:10 PM
AR Turntable Parts nedjinski Analogue Source 2 12th December 2004 08:27 PM
Tonearm Advice needed for an AR turntable ramond Analogue Source 8 20th October 2004 01:29 PM
AR turntable elizard Analogue Source 15 1st June 2004 08:36 AM


New To Site? Need Help?

All times are GMT. The time now is 02:40 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2